Type-writing machine.



No. 708,821. Patented Sept. 9, I902.

s. L. w. MERLIN.

TYPE WRITING MACHINE. (Appiication flied July 26 1900. Bonewed Aug" .6, 1902.)

(No Model.)

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INVENTOR WITNVESSES: V

m: malls pzrcns co, Pnorzxumm. WASHINGTON. n c.

ATTORNEY UNITED STATES PATENT OFFICE.

SIDNEY LOUIS WALTER MERLIN, OF PARIS, FRANCE.

TYPE-WRITING MACHINE.

SPECIFICATION forming part of Letters Patent No. 708,821, dated September 9, 1902.

Application filed July 26, 1900. Renewed August 6, 1902. Serial No. 113,658. (No model.)

To all whom it may concern.-

Be it known that I, SIDNEY LoUIs WALTER MERLIN, a subject of the Queen of Great Britain, residing at Paris, France, have invented certain Improvements in Type-Writing Machines, of which the following is a specification.

This invention relates to improvements in the carriages of type-writing machines,whereby the making of corrections while writing is greatly facilitated; and it belongs to that class of devices for effecting the object desired wherein the platen cylinder or roller is moved or shifted endwise to a limited extent.

The present invention provides a novel means for shifting the platen-roller endwise, and with it the paper; and it also provides means for regulating the angular movement of said roller.

In the accompanying drawings,which illustrate an embodiment of the invention, Figure l is afragmentary sectional view of the platenroller and adjusting mechanism. Fig. 2 is a plan of the same, showing both ends of said roller. Fig. 3 is a vertical section taken in the plane indicated by the line 00 in Fig. 1.

A designates the platen cylinder or roller, covered with india-rubber, as usual, and B is the shaft or spindle on which said roller is secured in any convenientmanner-as, for example, by means of end plates at a, screwed to the roller and secured to the shaft or spindle by set-screws. v The spindle B has a sliding and rotating bearing in the frame 0 of the carriage, and on its end is secured a'milled thumb-wheel b, as usual.

On the spindle B is formed a boss 0, exterior to the frame 0, and this boss is screwthreaded to receive a nut d, milled sothat it may be conveniently turned by the thu mb and finger. This nut d bears on the outer face of the frame 0, and by turning it in the proper direction the spindle B and roller A may be moved endwise in one direction, to the left as the parts are represented in Figs. 1 and 2, a spring 01' serving to move the roller in the opposite direction when permitted by the nut cl. The spring at may be on the spindle B, between a nut 61 thereon and the frame 0. A nut similar to the nut d might, however, be substituted for the spring for shifting the roller A to the right.

I form a reduced screw-threaded boss e on a projecting part of a boss on the roller A (here shown as on the plate a) to receive a milled nut f, which serves to clamp an arm h, mounted to swing on a journal formed on the boss of the roller, up to a shoulder g, thereby fixing said arm to the roller. The arm h carries at its free end an adjustable limitingscrew q, provided with lock-nuts r and s, and said arm is adapted to vibrate between the frame 0 and a lug k on a pendent bracket 13, secured to the frame 0.

, The operation of this device is as follows: The sheet of paper being placed on the roller A so that the line of writing registers exactly withthe scale, the milled nut f is loosened and the arm h lowered into contact with the lug k. The nut f is then tightened, so as to clamp the arm 71. to the roller, and the latter rotated forward until the head of the screw q impinges on the under side of the frame 0. This will bring the line of writing exactly to the position required. The object of the screw q is to regulatethe extent of rotation of the roller A to suit the linespacing of the machine.

I am aware that it is not new, broadly, to provide a type-Writing machine with means for moving the platen-roller thereof endwise to bring a point in the printed line exactly to the printing point, and this I do not claim. So far as this part of the present invention is concerned the novelty lies in the special means employed.

It may be proper to state that the lug or limiting-stop is will belong enough to permit the roller A to be shifted endwise to the maximum extent desired without carrying the arm h beyond the end of said lug. The other limiting-stop for the arm it may be the frame 0 itself or any part secured to it.

Having thus described my invention, I claim- 1. In a type-writing machine, the combination with the frame, and the platen-roller, its boss, and its spindle mounted rotatively in said frame, of an arm mounted on and adapted to swing about said boss, stops to limit the swing of said arm, and means for clamping said arm to the.,platen-ro1ler, substantially as set forth.

2. In a type-writing machine, the combination with the frame 0, the spindle B mounted rot-atively therein, the cylinder A, mounted on said spindle and provided with a screw e, and the boss of said cylinder, of the clamp-nutf on said screw, the arm 77,, hung on the boss of the cylinder and adapted to be clamped fast thereto by the nut f, the bracket 1' 7c, and the screw q in said arm h, substantially as and for the purpose set forth.

3. In a type-writing machine, the combination with the frame 0, and the platen-roller A, mounted rotatively therein and slidable longitudinally, of means for moving the said roller endwise with precision, and means for limiting the extent of its rotation for arm mounted to swing about the axis of the roller A, means for clamping it fast to the roller, and means for limiting the extent of its movement when so clamped fast, substantially as set forth.

4. In a type-writing machine, the combination with the frame 0, the spindle 13, mounted slidably and rotatively therein, the platen-roller A fixed on said spindle, and means for shifting said roller endwise in the frame, of the arm h, adapted to swing about the axis of the platen-roller, the nut for clamping said arm to the roller, the screw q in said arm, and stops for limiting the extent of swing of said arm when clamped to the roller, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

SIDNEY LOUIS WALTER MERLIN.

Witnesses:

EDW'ARD P. MACLEAN, ALEXANDER MATHIEU. 

